/*
  Dokpa Garment, independent design study 04, expedition dossier.
  Bright glacier ground, deep navy structure, one safety orange signal.
  Implementation technique adapted (not markup, not copy, not palette) from
  fashion-next, MIT, Copyright (c) 2020 Mohammad Oftadeh.
  See TECHNIQUE.md for the file by file record of what was read and changed.
*/

/* ---------------- reset ---------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { min-width: 320px; overflow-x: hidden; }
img { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
figure { margin: 0; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4, p, dl, dd, dt { margin: 0; }
table { border-collapse: collapse; }

/* ---------------- tokens ---------------- */
:root {
  --ice: #eef3f8;
  --ice-deep: #e2eaf3;
  --paper: #ffffff;
  --navy: #0f2547;
  --navy-mid: #1d3d6d;
  --ink: #0f2547;
  --muted: #4c6484;
  --rule: #c5d4e4;
  --rule-soft: #dde6ef;
  --signal: #ff5a1f;
  --signal-ink: #b8410b;
  --signal-wash: #ffe7dc;
  --frame: 1320px;
  --col: 96px;
  --gut: 40px;
  --sans: "Manrope", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --display: "Space Grotesk", "Manrope", "Segoe UI", system-ui, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", "Consolas", "Courier New", monospace;
}

body {
  background: var(--ice);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

/* ---------------- shared type ---------------- */
h1, h2, h3, h4 { font-family: var(--display); font-weight: 600; letter-spacing: -0.015em; line-height: 1.12; }
h1 { font-size: clamp(2.1rem, 5.4vw, 3.65rem); }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.35rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.45rem); }
h4 { font-size: 1.02rem; letter-spacing: 0; }
p { max-width: 66ch; }
strong { font-weight: 700; }

.stamp,
.rail-no,
.mono {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
}

.lede { font-size: clamp(1.02rem, 1.6vw, 1.2rem); color: var(--muted); }
.small { font-size: 0.9rem; color: var(--muted); }

a.inline {
  color: var(--signal-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
a.inline:hover { color: var(--navy); }

/* ---------------- frame and rails ---------------- */
.frame {
  width: 100%;
  max-width: var(--frame);
  margin: 0 auto;
  padding: 0 var(--gut);
}

.band { padding: clamp(3rem, 7vw, 6.5rem) 0; }
.band + .band { border-top: 1px solid var(--rule-soft); }
.band-paper { background: var(--paper); }

/* The measured grid: an annotation rail on the left, content on the right. */
.ruled {
  display: grid;
  grid-template-columns: var(--col) minmax(0, 1fr);
  gap: 0 var(--gut);
  align-items: start;
}

.rail {
  position: relative;
  padding-top: 0.4rem;
  color: var(--muted);
}
.rail .rail-no { color: var(--signal-ink); display: block; }
.rail .rail-label { display: block; font-size: 0.78rem; line-height: 1.4; margin-top: 0.35rem; }
.rail::after {
  content: "";
  position: absolute;
  top: 0.95rem;
  left: 3.1rem;
  width: calc(var(--col) - 2.4rem);
  height: 1px;
  background: var(--rule);
}

.ticks {
  height: 14px;
  margin-bottom: 1.6rem;
  background-image: repeating-linear-gradient(to right, var(--rule) 0 1px, transparent 1px 12px);
  border-bottom: 1px solid var(--navy);
}
.ticks-short { max-width: 220px; }

/* ---------------- skip link, study strip ---------------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 60;
  background: var(--navy);
  color: #fff;
  padding: 0.85rem 1.2rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
}
.skip-link:focus { left: 0.75rem; top: 0.75rem; }

.study-strip {
  background: var(--navy);
  color: #dfe9f5;
  font-size: 0.82rem;
  line-height: 1.5;
  padding: 0.6rem 0;
}
.study-strip .frame { display: flex; gap: 0.9rem; align-items: baseline; flex-wrap: wrap; }
.study-strip .stamp { color: var(--signal); }
.study-strip p { max-width: 92ch; margin: 0; }

/* ---------------- masthead and navigation ---------------- */
.masthead {
  background: var(--paper);
  border-bottom: 1px solid var(--navy);
}
.masthead-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding-top: 1.1rem;
  padding-bottom: 1.1rem;
}
.mark { text-decoration: none; display: block; }
.mark .mark-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.32rem;
  letter-spacing: 0.14em;
}
.mark .mark-sub {
  display: block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 0.15rem;
}

.deck-nav ul { display: flex; align-items: center; gap: 1.6rem; flex-wrap: wrap; }
.deck-nav a {
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.35rem 0;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
}
.deck-nav a .n {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--signal-ink);
}
.deck-nav a:hover { border-bottom-color: var(--rule); }
.deck-nav a[aria-current="page"] { border-bottom-color: var(--signal); font-weight: 700; }

.drawer-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--navy);
  padding: 0.5rem 0.85rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.drawer-toggle .bars {
  width: 18px;
  height: 9px;
  border-top: 2px solid var(--navy);
  border-bottom: 2px solid var(--navy);
  display: block;
}
.drawer-toggle[aria-expanded="true"] { background: var(--navy); color: #fff; }
.drawer-toggle[aria-expanded="true"] .bars { border-color: #fff; }

.drawer {
  display: none;
  background: var(--paper);
  border-bottom: 1px solid var(--navy);
}
.drawer .frame { padding-top: 1.2rem; padding-bottom: 1.6rem; }
.drawer a { text-decoration: none; }
.drawer-list > li { border-top: 1px solid var(--rule-soft); }
.drawer-list > li:first-child { border-top: 0; }
.drawer-list > li > a {
  display: flex;
  gap: 0.75rem;
  padding: 0.8rem 0;
  font-size: 1.02rem;
}
.drawer-list .n {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--signal-ink);
  letter-spacing: 0.1em;
  padding-top: 0.32rem;
}
.drawer-group { border-top: 1px solid var(--rule-soft); }
.drawer-group-btn {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
  font-size: 1.02rem;
  text-align: left;
}
.drawer-group-btn .chev { font-family: var(--mono); font-size: 0.8rem; color: var(--signal-ink); }
.drawer-sub { padding: 0 0 0.6rem 1.1rem; border-left: 1px solid var(--rule); margin-left: 0.2rem; }
.drawer-sub a { display: block; padding: 0.4rem 0; font-size: 0.95rem; color: var(--muted); }
.drawer-sub a:hover { color: var(--navy); }

/* ---------------- cover ---------------- */
.cover { background: var(--paper); border-bottom: 1px solid var(--navy); }
.cover-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2.5rem, 5vw, 4rem);
}
.cover h1 { margin: 1.1rem 0 1.3rem; }
.cover-kicker { display: flex; gap: 0.8rem; align-items: center; color: var(--signal-ink); }
.cover-kicker::after { content: ""; height: 1px; flex: 1; background: var(--rule); }

.meta-list { margin-top: 2.2rem; border-top: 1px solid var(--navy); }
.meta-list div {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr);
  gap: 1rem;
  padding: 0.62rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.meta-list dt {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 0.2rem;
}
.meta-list dd { margin: 0; font-size: 0.98rem; }

.cover-plate { position: relative; }
.cover-plate img { width: 100%; height: auto; border: 1px solid var(--navy); background: var(--paper); }
.plate-tag {
  position: absolute;
  top: -1px;
  left: -1px;
  background: var(--navy);
  color: #fff;
  padding: 0.3rem 0.6rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
}
.cover-plate figcaption { margin-top: 0.7rem; font-size: 0.86rem; color: var(--muted); }

/* ---------------- callouts and flags ---------------- */
.flag {
  border: 1px solid var(--navy);
  border-left: 5px solid var(--signal);
  background: var(--paper);
  padding: 1.15rem 1.3rem;
}
.flag .stamp { color: var(--signal-ink); display: block; margin-bottom: 0.4rem; }
.flag p + p { margin-top: 0.6rem; }

.note-box {
  background: var(--ice-deep);
  border: 1px solid var(--rule);
  padding: 1.1rem 1.25rem;
}

/* ---------------- grade key and pills ---------------- */
.grade {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--navy);
  white-space: nowrap;
}
.g-corroborated { background: var(--navy); color: #fff; }
.g-supplied { background: var(--paper); color: var(--navy); }
.g-observed { background: var(--signal-wash); color: var(--signal-ink); border-color: var(--signal-ink); }
.g-contradicted { background: var(--signal); color: #21160f; border-color: var(--signal-ink); }
.g-unresolved { background: var(--ice-deep); color: var(--muted); border-style: dashed; }

.key-list { display: grid; gap: 0; border-top: 1px solid var(--navy); margin-top: 1.5rem; }
.key-list div {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 1.1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: start;
}
.key-list dd { margin: 0; font-size: 0.95rem; }

/* ---------------- observation rows ---------------- */
.rows { margin-top: 1.6rem; border-top: 1px solid var(--navy); }
.row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 0 1.4rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: start;
}
.row-no {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--signal-ink);
  padding-top: 0.24rem;
  letter-spacing: 0.08em;
}
.row-what { font-weight: 600; }
.row-what .row-note {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}
.row-evidence { font-size: 0.88rem; color: var(--muted); }
.row-evidence .grade { margin-bottom: 0.4rem; }
.row-evidence code {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--navy);
  background: var(--ice-deep);
  padding: 0.1rem 0.3rem;
  display: inline-block;
  margin: 0.12rem 0.2rem 0.12rem 0;
}

/* ---------------- segmented pill rail and panels ---------------- */
.tabset { margin-top: 2rem; }
.tabs-rail { display: none; flex-wrap: wrap; gap: 0.55rem; }
.js .tabs-rail { display: flex; }
.pill {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  border: 1px solid var(--navy);
  background: var(--paper);
  padding: 0.6rem 1.05rem;
  font-size: 0.94rem;
  border-radius: 999px;
  transition: background 140ms ease, color 140ms ease;
}
.pill .pill-no {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--signal-ink);
}
.pill[aria-selected="true"] { background: var(--navy); color: #fff; font-weight: 700; }
.pill[aria-selected="true"] .pill-no { color: var(--signal); }
.pill:hover { background: var(--ice-deep); }
.pill[aria-selected="true"]:hover { background: var(--navy-mid); }

.nojs-note { display: block; }
.js .nojs-note { display: none; }

.panel { padding-top: 2rem; }
.panel + .panel { border-top: 1px solid var(--rule-soft); margin-top: 2rem; }
.js .panel + .panel { border-top: 0; margin-top: 0; }
.panel-head { display: flex; gap: 0.9rem; align-items: baseline; flex-wrap: wrap; }
.panel-head .stamp { color: var(--signal-ink); }

/* ---------------- plate viewer ---------------- */
.plates { margin-top: 2rem; }
.plate-stage {
  border: 1px solid var(--navy);
  background: var(--paper);
  padding: 0.9rem;
}
.plate-stage img {
  width: 100%;
  height: clamp(300px, 52vh, 560px);
  object-fit: contain;
  background: var(--paper);
}
.plate-stage figcaption {
  display: flex;
  gap: 0.9rem;
  align-items: baseline;
  flex-wrap: wrap;
  margin-top: 0.9rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--rule-soft);
  font-size: 0.9rem;
  color: var(--muted);
}
.plate-stage figcaption .stamp { color: var(--signal-ink); }

.plate-rail {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.9rem;
  margin-top: 0.9rem;
}
.plate-rail .thumb { border: 1px solid var(--rule); background: var(--paper); padding: 0.4rem; height: 100%; }
.plate-rail img { width: 100%; height: 132px; object-fit: cover; }
.plate-rail figcaption { font-size: 0.78rem; color: var(--muted); margin-top: 0.45rem; line-height: 1.4; }
.plate-rail figcaption .stamp {
  display: block;
  color: var(--signal-ink);
  font-size: 0.62rem;
  margin-bottom: 0.15rem;
}
.plate-btn { display: block; width: 100%; text-align: left; padding: 0; }
.plate-btn[aria-pressed="true"] .thumb { border-color: var(--navy); box-shadow: inset 0 0 0 2px var(--signal); }
.plate-btn:hover .thumb { border-color: var(--navy); }

/* ---------------- figures ---------------- */
.plate-pair {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--gut);
  margin-top: 2rem;
}
.figure-block {
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: 0.75rem;
  position: relative;
}
.figure-block img { width: 100%; height: 300px; object-fit: cover; }
.figure-block figcaption { margin-top: 0.7rem; font-size: 0.86rem; color: var(--muted); }
.figure-block figcaption .stamp { display: block; color: var(--signal-ink); margin-bottom: 0.25rem; }

/* ---------------- record tables ---------------- */
.table-scroll { overflow-x: auto; margin-top: 1.6rem; }
table.record { width: 100%; min-width: 620px; font-size: 0.92rem; }
table.record caption {
  text-align: left;
  font-size: 0.86rem;
  color: var(--muted);
  padding-bottom: 0.8rem;
  max-width: 78ch;
}
table.record th,
table.record td {
  text-align: left;
  vertical-align: top;
  padding: 0.7rem 1rem 0.7rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
table.record thead th {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--navy);
  font-weight: 500;
}

/* ---------------- contact ---------------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: var(--gut);
  margin-top: 2rem;
}
.contact-card { border: 1px solid var(--navy); background: var(--paper); padding: 1.3rem; }
.contact-card .stamp { color: var(--signal-ink); display: block; margin-bottom: 0.6rem; }
.contact-card a { color: var(--navy); }
.contact-card .big {
  font-family: var(--display);
  font-size: 1.18rem;
  font-weight: 600;
  word-break: break-word;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--navy);
  padding: 0.7rem 1.2rem;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.btn-solid { background: var(--navy); color: #fff; }
.btn-solid:hover { background: var(--navy-mid); }
.btn-line:hover { background: var(--paper); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.6rem; }

.checklist { margin-top: 1.4rem; }
.checklist li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 0.8rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--rule-soft);
}
.checklist li .box { width: 16px; height: 16px; border: 1px solid var(--navy); margin-top: 0.35rem; }

/* ---------------- footer ---------------- */
.site-footer {
  background: var(--navy);
  color: #d9e5f2;
  padding: clamp(2.5rem, 5vw, 4rem) 0 2.5rem;
}
.site-footer a { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gut);
}
.site-footer h2 { font-size: 1.05rem; color: #fff; }
.site-footer .stamp { color: var(--signal); display: block; margin-bottom: 0.7rem; }
.site-footer p { font-size: 0.9rem; }
.site-footer ul li { padding: 0.22rem 0; font-size: 0.9rem; }
.footer-base {
  margin-top: 2.6rem;
  padding-top: 1.3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 0.82rem;
  color: #b9cbe0;
}
.footer-base p { max-width: 100%; }
.footer-ward { color: var(--signal); }

/* ---------------- focus ---------------- */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 2px;
}
main:focus-visible { outline: 3px solid var(--signal); outline-offset: 4px; }

/* ---------------- fail safe reveal ---------------- */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity 520ms ease, transform 520ms ease; }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .pill { transition: none; }
}

/* ---------------- responsive ---------------- */
@media (max-width: 1040px) {
  .cover-grid { grid-template-columns: minmax(0, 1fr); }
  .row { grid-template-columns: 46px minmax(0, 1fr); }
  .row-evidence { grid-column: 2; padding-top: 0.5rem; }
}

@media (max-width: 900px) {
  :root { --col: 68px; --gut: 28px; }
  .ruled { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
  .rail { display: flex; gap: 0.9rem; align-items: baseline; padding-top: 0; }
  .rail::after { display: none; }
  .rail .rail-no, .rail .rail-label { display: inline; margin: 0; }
  .js .deck-nav { display: none; }
  .js .drawer-toggle { display: inline-flex; }
  .js .drawer.open { display: block; }
  .deck-nav ul { gap: 1rem; }
  .meta-list div { grid-template-columns: 130px minmax(0, 1fr); }
  .key-list div { grid-template-columns: 122px minmax(0, 1fr); gap: 0.8rem; }
}

@media (max-width: 560px) {
  :root { --gut: 20px; }
  body { font-size: 16px; }
  .meta-list div, .key-list div { grid-template-columns: minmax(0, 1fr); gap: 0.3rem; }
  .plate-rail { grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); }
  .figure-block img { height: 230px; }
  .masthead-row { gap: 0.8rem; }
  .mark .mark-name { font-size: 1.12rem; }
}

@media (max-width: 360px) {
  :root { --gut: 16px; }
  .plate-rail { grid-template-columns: minmax(0, 1fr); }
  .btn { font-size: 0.66rem; padding: 0.65rem 0.9rem; }
}